Process and apparatus for roasting ores.



v A. R.v WILPLEY. PROGESS AND APPARATUS, FOR ROASTING ORES.

APPLICATION. FILED 0OT.6, 1910.

Patented June 27, 1911.

4 SHEETSSHBET 1.

A. R. WILFLEY. PROCESS AND APPARATUS FOR ROASTING DEBS;

APPLICATION FILED 00'1.6, 1910.

996,548., Patented June 27,1911.

4 BHEETSSHEET 2. 5

/4. T o z I r 511m: 0 fox l 91471400920 A. R. WILPLEY.

PROCESS AND APPARATUS FOR ROASTING ORES. 1

APPLICATION FILED 0013.6, 1910.

996,548., Patented June 27, 1911.

'4 SHEETS-SHEET 3.

witnesses @%5%%% a A. R. WILFLEY. PROCESS AND APPARATUS FOR ROASTINGGEES;

1 APPLICATION FILED OOT.6, 1910. 9 ,54 1 Patented June 27, 1911.

4 BHEETB-SHEET 4.

UNITED STATES TE EEicE.

'ARTHUR R. wILELEY, or DENVER, ooLomo, Asswmn'or ONE-HALF To JosEPHSEEP, or TITUSVILLE, .rENNsYLvANIA.

PROCESS AND APPARATUS FORECASTING ORES.

To all whom it may concern:

useful Improvements, in Processes and Apparatus for Roasting Ores; and Ido" declare the following to be a full, clear, and

exact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same, referencebeing had .to the accompanying drawings, and to-thefletters and figuresof reference marked thereon, whichform a part. of this specification.

My invention relates to a process "and apparatus for roasting ores.

Thisinvention is more especially intended 'for use in producing what isknown as a magnetic roast, meaning a roastwhich shall render the oremagnetic or. amenable to the action of. magnetism for the purpose ofseparating. the metallic particles. from the} gangue.

.The process, however, consists 'inemploy ing steam or other suitablemoisture con-; taining' fluid for the .purpose of completely removingthe ore particles. from the roasting hearth, the vapor serving at thesame time by virtue of its moisture, to check oxidation and thus preventthe possible over-roasting of the ore for purposes of,

magnetic separation...

the drawing, an endless horizontally disposed rotary hearth is employed.As illustrated in the drawing, a nozzle for passing vapor across thehearth in a transverse di-v rection is shown. Of course any suitableapparatus may be employed, for accomplish ing this purpose,Iilurthermore, the apparatus includes tanks or jackets through whichcooling liquid is constantly circulated, said jackets being located insuch proximity to the ore on the hearth as to ,eificiently perform thefunction of preventthe space surrounded bythe circular trav-.

eling hearth is utilized as a chamber into which the roasted ore isremoved through the agency of the vapor blast. This space is screencovered for the purpose of preventing the escape of the-ore particleswhile Specification of Letters latent. Application filed October 6,1910. Serial 110385521.

, Patented June 27, 1911.

allowing the escape .of any uncondensed f Be it known that I, ARTHUR R.WILFLEY, a citizen of the United States, residing in. the city andcounty of Denver and State of Colorado, have invented certain new and;

vapor "with.

Having briefly outlined my improved process together with a suitableapparatus and air which may be mingled therefor carrying outthe process,I will proceed to describe the invention in detail, reference. 7

urthermore in this view the top of the central chamber is partly brokenaway. Fig. 2 is a section taken through the feed hopper also cuttingchamber on the line 2--2 Fig. 1. Fig. .3 is a Isectiontaken on the line3+3 Fig. 2. 4 is a section taken on the line 4-4 Fig. 1.

Figs. 5-a'nd 6 are sectionstaken on the lines 5-5 and 6+6, respectively,of Fig. 1. I

The same reference characters indicate the same partsin all the views.

the hearth and roasting a Let the numeral 5 designate a roastingchamber,

hangers connected with the hearth and carrying wheels '8 which engagetracks 9 '-for supporting the hearth. Journaled in the bed or lower partof the masonry 10 is a shaft 12 upon which is mounted a gear wheel 13which engages a gear l tsecured to the bottom of thetraveling hearth; To

v the outer exposed. end of the shaft is made In my improved apparatusas disclosed in fast a pulley wheel 15 whichmaybeconnected by 'means ofa belt with any suitable.

6 the endless traveling hearth, .7

motor adapted to supply the power for imparting hearth. V

As illustrated in the drawing, stationary rabbles 16 are mounted in theroasting chamber for the purpose of stirring the ore, whereby itsparticles are advantageously exposed for roasting purposes. However, ifthe layer of ore upon the hearth is sufli ciently thin, rabbling may bedispensed with. Heat is supplied to the roasting chamber 5 from afurnace 17 having a grate 18, sufficient fuel 19 being supplied to thegrate through an opening 20 normally closed by a door 21. The heat andproducts of combustion pass to the roasting chamber through' an opening22 communicating with the combustion compartment of the furnace abovethe grate.

' the traveling movement to the hopper 23 having a distributing roll 24below its discharge opening, whereby the ore is evenly distributed uponthe hearth as the latter passes below the. hopper.

Receptacles 25 are passed transversely through the roasting chamberabove the hearth and are adapted to receive cooling water, which iscirculated 'therethrough through the agency of pipes 26 and 27, the

pipe 27 being provided with a valve 28.

The steam or other moisture-containing vapor is delivered to the hearththrough a nozzle 29 connected with a supply pipe 30 having a controllingvalve 31.

As illustrated in the-drawing, a housing 32 covers the hearth andextends inwardly as shown at 33, partly covering a central chamber 34into which the ore particles 35 are carried as they are removed from thehearth through the agency of the vapor. blast. The central portion ofthe chamber 34 is covered by a screen 36 of suitable mesh to prevent theescape of the ore particles, but at the same time permitting the escapeof vapor and air.

In carrying out my improved process, the ore is fed to .the endlesstraveling hearth through the hopper 23, being distributed thereonthrough the agency of the roller 24 it has made only a portion of thecircuit.

blast from the nozzle29.

However, in case more than one nozzle were employed, more than one feedhopper also would be necessary in order that the hearth mightbe suppliedwith ore immediately after its removal therefrom through theinstrumentality of the vapor blast. However, the employment of more thanone vapor nozzle and more than one feed hopper would be mereduplication, and it has therefore not been jthought necessary toillustrate this modification in the drawing.

In order to distribute the roasted ore within the chamber 34, deflectors37 are provided; One of these deflectors is so located that the orestrikes it as soon as it leaves the hearth, under the influence of thevapor This deflector-is curved to give the ore a sort of whirling actionas it enters the said chamber, and this action causes it to strike thesecond deflector on the opposite side, but with less force. It isbelieved that the two deflectors will be sufficient to distribute theore approximately evenly within the said chamber.

The roasted ore may be removed from the central chamber 34 in "anysuitable man- 5 ner. It would, of course, be practicable to make a holein the wall underneath the circular chamber in which the hearth islocated, through which the ore could be dragged out of the chamber bytheuse of long rakes or by an endless conveyer, as desired. Thesefeatures are not illustrated as nothing is claimed upon the manner ofremoving the ore. from the said chamber.

Having thus described my invention, what I claim is:

1. The herein described ore roasting process, consisting insubjectingthe ore to the action of heat upon a hearth and removing theore therefrom by a moisture-containing vapor blast.

2. The herein described ore roasting process, consisting in subjectingthe ore to the action of heat upon a traveling hearth, and removing thesame therefrom through the agency of a moisture-containing vapor blast,for the purpose set forth.

3. The herein described ore roasting process, consisting of subjectingthe ore to heat upon an endless travelin hearth, and removing the orefrom the earth at a predetermined point or location in the circuit oftravel, substantially as described.

4. The herein described process for producing a magnetic roast,consisting in subjecting the oreto heat upon a revolving hearth anddischarging a moisture-containing-vapor blast across the hearth, wherebythe ore is completely removed from the hearth at a predetermined pointor location in its circuitof travel, substantially as described.

5. Theherein described ore roasting process, consisting in heating theore upon a hearth and completely removing the same therefrom bysubjecting it to the action of a moisture-containing vapor blast,substantially as described.

,6.. The herein described ore roasting process, consisting in heatingthe ore upon a traveling hearth, employing cooling liquid placed in thevicinity of the hearth for properly reducing the temperature, andcompletely removing the ore from the hearth at predetermined intervalsthrough the agency of a moisture-containing vapor blast, substantiallyas described.

7. An ore roasting apparatus comprising an ore roasting chamber, anendless traveling horizontally disposed circular hearth located in saidchamber, an ore chamber surrounded by the ore roasting chamber, andmeans for removing the ore from the hearth and discharging it into saidore chamber through the agency of a fluid blast.

8. An ore roasting apparatus including an endless traveling horizontallydisposed circular hearth, an ore chamber surrounded by the hearth, andmeans for removing the ore from the hearth and discharging it into saidchamber through the agency of a fluid blast,

said blast being directed crosswise of the hearth, substantially asdescribed.

9. An ore roasting apparatus comprising a circular ore roasting chamber,an ore chamber surrounded by the roasting chamber, and means forremoving the ore from the hearth and discharging it intosaid central orechamber through the agency of a fluid blast directed crosswise of thehearth, the central ore chamber having a covering composed in part ofmesh material sufficiently fine to prevent the escape of ore from thechamber, substantially as described.

10. An ore roasting apparatus comprising a circular roasting chamber,a-horizontally disposed traveling hearth mounted in said chamber, an orechamber surrounded by the roasting chamber, and means for removing theore from the hearth and discharging it into the central ore chamberthrough the agency of a fluid blast directed crosswise of the hearth,the central ore chamber being equipped with curved deflectors for thepurpose of distributing the ore in the said chamber, substantially asdescribed.

In testimon whereof I afiix my signature in presence 0 two witnesses.

ARTHUR R. WILFLEY.

Witnesses:

A. J. OBRIEN, F. E. BOWEN.

